Question

that作什么成分？

we should attach importance to perseverance mainly due to that it can enable us to ameliorate ourselves so we can be qualified for future career promotion,

Answer 1

that有定语从句和同位语从句之分。

①定语从句引导词被称为关系词，that充当主语、宾语、表语。有时可省略。

②同位语从句引导词被叫做连词，that不能充当任何成分，不可省。
Word came that their army was defeated.(同位语)
We expressed to them our wish that was the same as their.(定语)

同位语从句的that只是引导词，没有其他语法作用，在句子中不作句子成分，不能省略；而定语从句（定语从句的详细解析请参见定语从句部分）中的that 除了引导定语从句外，还是定语从句的一个成分，在定语从句中作主语或宾语，作主语时不能省略，作宾语时可以省略。

例句：
I've got an answer that A is right. (同位语从句，that 不作成分)
I've got an answer that surprised me a lot.(定语从句，that作定语从句的主语)
判断下列句子是同位语从句还是定语从句？

The idea that some peoples are superior to others is sheer nonsense.

认为有些民族优越于其他民族的想法简直荒谬。(同位语从句)

The idea that he proposed at the meeting is sheer nonsense.

他在会议上提出的这个想法简直荒谬。(定语从句)

The difficulty lies in the fact that we are short of money.

困难在于我们缺乏资金这个事实。

Answer 2

that在引导定语从句时是关系代词在从句中起代词作用代替先行词可以在定从中充当主语宾语等句子成分，充当宾语时that可以省略。在限制性定语从句中that有时也可以充当关系副词作定从中作状语，这种用法的that也可以省略。 that在引导名词性从句时是连接词仅起连接作用不能在从句中充当句子成分本身也没有意思，that在引导宾语从句时可以省略。

Answer 3

这里的due to 因为 to 介词 他想说因为后面这个情况。正因为如此，to介词后面不能加that引导的宾语从句。从句子分析来看，他that 后面这里确实是宾语从句。所以得改动一下。把that 前面加个词the fact 把that 后面的从句就变成同位语从句了。😛

Answer 4

引导宾语。。。